Controlling-switch for transformers.



No. 851,786 n PATENTED APR. 30, 1907.

M. 0. TROY,

GONTROLLING SWITCH FOR TRANSFRMERS.

APPLICATION FILED JUNE 2z, 1906.

, citizen of the orf LII

lUNITED sTATns PATENT oniuon.

MATTHEW O. TROY, OF SCHENECTADY, NEW YORK, ASSIGN OR TO GENERAL l ELECTRIC COMPANY, A CORPORATION OF NEW YORK CONTROLLING-SWITCH FOR TRANSFOHMERS.

No 8.51 ,76. Specication'of Letters Patent.

Application filed Tune 22, 1906. Y Serial No. 322,871.

Patented April 3,0, 1907.

Tf1/LIZ w/m//L r3 may concern:

Be it known that I, MATTHEW O. TROY, a

United States, residing at Schenectady, county of Schenectady, State of New York, haveinvented certain new and useul Improvements in ControllingeSwitches for Transformers, of which the following is a specification.

My invention relates toswitching devices for transformers,and particularly for st the other switch may be placed any desired distance away, and by' properly arranging the automatic control, the desired se of operation is secured, so that the hig sion switch may be arranged to open and close on no-load only; thereby' permitting e use of a cheap construction. v

My invention will best be understood by re erei'ice to tl ie accompanyin drawing,

diagrammatical y ranged in accordance with my invention.

' n the drawing, A represents an alternator instance, in factories or ing-current trans ating device, which is illustrated as an inductionmotor of the squirrelcage type B high-tension I supply conductors for the mot bringing the high the building, The trans u the motor to the transformer secondar andl practicable to y etween the i represents a switch connecting the transtransformerpriinary and the supply-circuit .former primary to the supply-conductors. adapted to be opened under load, since such The switch E is provided with a tensiona switch, having to be designed for high voltage, would ordinarily e very costly. On the other hand, if a switch were provided on the high-tension side of the transformer supplied with current from any suitable adapted to open the circuit on no-load only, l source, such as an there would be danger that the operator and is controlled by auxil` might open this switch before opening the which are controlled by th switch o'n the l the trans- When the switch D is moved former, which might result in the destruction Consequently, ractice heretofore to omit switches fromt e transformer and to rimary directly to the supply circuit through l member of the gli-tension fuses or ot er protective dethen to connect it across the terminalsof the vices. With such an arrangement the trans.

1n a core loss y the all-day eciency of the combination, particularly if the motor operates for yonly a small portion of the day.

y invention consists in providing an automatic switch in the primary circuit cond, and conseexpensive construc- Aq uently need not be of ithermore, since the operation of tion.

Vmeans for switch E Ais entirely automatic, the proper sequence of operation of the `switches D and E is secured without requiring any attention from the operator.

I do not desire to limit myself to the particular construction and arrangement of pa ts here shown, but aim in the appendet claims to cover all modifications which are Within the scope of my invention. i

What I claim as new and desire to secure by Letters Patent of the United States, is,

l. In combination, 'a supply circuit, a transformer, a translating device, a switch adapted to connect thetransforiner primary to the supply-circuit, a second switch adapted to connect the transformer second ary to the device, and means for operating one of said switches automatically when the other switch is operated.

2. In combination, .a supply circuit, a transformer, a translating device, a switch adapted to connect the transformer primary to the supply circuit, a second switch adapted to connect the transformer secondary to the device, and automatic operating means fory one switch controlled by the opening and closing of the other switch'.

3. In combination, a supply circuit," a transformer, a translating device, a switch adapted to connect lthe transformer primary to the supply circuit, a second switch adapted to connect the transformer secondary to the device, and electromagnetic operating one switch controlled by contacts controlled by the other switch.

4. In combination, a supply circuit, a transformer, a translating device, a switch adapted to connect the transformer primary to the supply circuit, a second switch ad apt-- ed to connect the transformer secondary to the device, a magnet winding for operating one switch, and contacts in circuit with said magnet winding controlled by the other switch.

5. In combination, a supply circuit, a transformer, a translating device,

Aa switch tto the supply circu t ed to connectthe transformer secondary to adapted to connect the transformer primary il, a second switch adapt the device, a magnet winding adapted to close one switch, and means for energizing said magnet upon the closing of the other switch.

6. In combination, an. alternating current motor, a supply circuit therefor, a trans 'former inserted between the motor and supply circuit, a switch for disconnecting the motor from the transformer, and means for automatically disconnecting the transformer from. the supply circuit when said switch is IOpened.

7. In combination, a supply circuit, al transformer, a translating device, a switch adapted to connect the transformer primary to the supply circuit, a second switch adapted to connect the transformer secondary to the device, a magnet winding for operating the first switch, and contacts in circuit with said magnet winding controlled by the second switch, said contacts being arranged to bev closed before and opened after the main contacts of the second switch aretclosed and opened.

8. In combination, a supply circuit, a transformer, a translating device, an automatic switch for opening the circuit between the transformer and the supply circuit, a second switch adapted to connect the transformer secondary to the translating device, an electromagnet for closing said automatic switch, and auxiliary contacts on said second switch for controlling the circuit of said electromagnet, said contacts being arranged to be closed before and opened after the main contacts of the second switch are closed and opened.

In witness whereof I have hereunto set' my hand this 21st day of June, i906.

, MATTHEW O. TROY. Titnessesz f BENJAMIN B. HULL, HELEN Onronn. 

